78929487 has 48 divisors (see below), whose sum is σ = 148599360. Its totient is φ = 39177216.

The previous prime is 78929479. The next prime is 78929507. The reversal of 78929487 is 78492987.

78929487 is a `hidden beast` number, since 78 + 92 + 9 + 487 = 666.

It is not a de Polignac number, because 78929487 - 2³ = 78929479 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78929687) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 11089 + ... + 16757.

It is an arithmetic number, because the mean of its divisors is an integer number (3095820).

Almost surely, 2^78929487 is an apocalyptic number.

78929487 is a deficient number, since it is larger than the sum of its proper divisors (69669873).

78929487 is a wasteful number, since it uses less digits than its factorization.

78929487 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5712 (or 5709 counting only the distinct ones).

The product of its digits is 2032128, while the sum is 54.

The square root of 78929487 is about 8884.2268656310. The cubic root of 78929487 is about 428.9563422409.

It can be divided in two parts, 789 and 29487, that added together give a square (30276 = 174²).

The spelling of 78929487 in words is "seventy-eight million, nine hundred twenty-nine thousand, four hundred eighty-seven".